Leading the way to a cure


Measurement of Erythrocyte C4d and Complement Receptor 1 in Systemic Lupus Erythematosus

Ahearn, Joseph, MD

University of Pittsburgh

November 1, 2004

C4-derived activation fragments are the only complement ligands present on the surfaces of normal erythrocytes. The significance of this observation is unknown, and the role of erythrocyte-bound C4 (E-C4) in human disease has not been explored. More than any other human disease, the pathogenesis of systemic lupus erythematosus (SLE) has been characterized by defects in clearance of complement-bearing immune complexes via erythrocytes expressing complement receptor 1 (CR1). This study was undertaken to determine whether these functional defects might be reflected by abnormal patterns of E-C4 and E-CR1 expression on erythrocytes of patients with SLE.

Click here to read full text

1.5 million

people in the U.S. have Lupus.

172 million

dollars committed to lupus research by the Lupus Research Alliance.

We're walking across the United States to raise awareness and funds for lupus research.


Show your support by visiting the Lupus Research Alliance online store. Discover the perfect gift, or prepare for a walk with our selection of apparel and accessories.

Powered by Blackbaud
nonprofit software